UVW Randomizer in specular channel problem

[MattiaPenazziArchitect]

Hello!
I'm here to report a possible bug. If I load a specular map into a uvw randomizer shader, the material is rendered in a wrong scale or mapping, as you can see from the attached images.
I have done 3 test:
1_textures loaded without randomizer;
2_all the textures loaded with uvw randomizer;
3_all the textures, except the specular map, loaded with uvw randomizer.
Does anyone else faced this problem?